Procedure
To connect the signal lines, proceed as follows:
1. Connect the signal lines at the intended clamping points.
2. Connect the shield to the shield bus as shown under Using the equipotential bonding strip
and shield bus (Page 95). Refer to the "Circuit manual for power unit" for the precise
assignment. Pay attention to the EMC directives.
6.13 Connecting the closed-loop control
6.13.1 Connecting ground
DANGER
Danger due to failure of the protective and monitoring equipment
The converter must be grounded to ensure that it operates safely and reliably. If the converter
is operated with insufficient grounding, then the protection and monitoring functions can fail.
Death, serious injury, or material damage will result.
● Always apply all of the necessary protective measures.
● Always observe the five safety rules when working with the converter.
● Follow these steps when grounding the machine:
– Establish the connections in a cabinet.
– Ensure that the connections are also established over several cabinets.
– Establish the ground connection for the whole plant immediately.
Each cabinet has a grounding lug for grounding the components installed in the cabinet. It is
located at the bottom of the cabinet. Connect the cabinets securely to the plant grounding
system via these grounding lugs.
Figure 6-8 Grounding lug
Electrical connection
6.13 Connecting the closed-loop control
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE 99
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